Testing Backbone + RequireJS Applications with Jasmine | Simple Thoughts: "Obviously, we can take advantage of the AMD architecture, to help us write modular tests (or “specs” in the BDD language).
To get a better sense of the challenges and different approaches in unit testing, I wrote the exact same tests three times using three different testing frameworks: Jasmine, Mocha and QUnit."

Naïve Bayes Classification: "The underlying idea is to use individual words present in the text as indications for what category it is most likely to belong to, using Bayes Theorem, named after the cheerful-looking Reverend Bayes.

Imagine that you received an email containing the words “Nigeria”, “Prince”, “Diamonds” and “Money”. It is very likely that if you look into your spam folder, you’ll find quite a few emails containing these words, whereas, unless you are in the business of importing diamonds from Nigeria and have some aristocratic family, your “normal” emails would rarely contain these words. They have a much higher frequency within the category “Spam” than within the Ham, which makes them a potential flag for undesired business ventures.

DailyJS: A JavaScript Blog: "jquery.defer/jquery.undefer (GitHub: wheresrhys / jquery.defer, License: MIT) by Rhys Evans are a pair of utility methods for making an object’s methods wait until a deferred object has resolved. The example Rhys provides of this in action is lazy loading Google Maps:"

C++ containers that save memory and time: "We’re pleased to announce C++ B-Tree, a C++ template library that implements B-tree containers with an analogous interface to the standard STL map, set, multimap, and multiset containers. B-trees are well-known data structures for organizing secondary storage, because they are optimized for reading and writing large blocks of data. But the same property that makes B-trees appropriate for use with databases and file systems also makes them appropriate for use in main-memory, just with smaller blocks."

High Performance JS heatmaps - Codeflow: "You might have encountered heatmaps for data visualization before. There is a fabulous library, heatmap.js, which brings that capability to draw them to javascript. There is only one problem, it is not exactly fast. Sometimes that doesn't matter. But if you have hundreds of thousands of data points to plot, or need realtime performance, it gets tricky. To solve that I've written a little engine using WebGL for drawing heatmaps."

DailyJS: A JavaScript Blog: "Starting a project today involves selecting a package manager, module system, build system, templating language, data binding library, a sync layer, a widget library, and a test framework. And it doesn’t end there: many of us also regularly use a dynamic CSS language, and mobile SDKs"